It's the feeling you get when someone says something so gross and yet, so hysterical, you don't know whether to laugh or gag. Or both. Therefore the feeling of gaghling.
SHANNON: My friend found many mice in her room, they caught some with mousetraps, and they took a picture of their guy friend with a face of disgust and an open mouth, and it looks like he's going to eat them, little mice appetizers. Ana: OMG, I don't know whether to laugh or gag right now, I'm gaghling! EW!
by copacabannie June 22, 2011